/*
 * Copyright (C) 2015 The Pennsylvania State University and the University of Wisconsin
 * Systems and Internet Infrastructure Security Laboratory
 *
 * Author: Damien Octeau
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package edu.psu.cse.siis.coal.arguments;

import java.util.Objects;

import soot.Unit;

/**
 * An identifier for an argument value. It is composed of a program statement and an
 * {@link Argument}.
 */
public class ArgumentValueIdentifier {
  private final Unit stmt;
  private final Argument argument;

  public ArgumentValueIdentifier(Unit stmt, Argument argument) {
    this.stmt = stmt;
    this.argument = argument;
  }

  @Override
  public int hashCode() {
    return Objects.hash(this.stmt, this.argument);
  }

  @Override
  public boolean equals(Object other) {
    if (other instanceof ArgumentValueIdentifier) {
      ArgumentValueIdentifier argumentValueIdentifier = (ArgumentValueIdentifier) other;
      return Objects.equals(this.stmt, argumentValueIdentifier.stmt)
          && Objects.equals(this.argument, argumentValueIdentifier.argument);
    }
    return false;
  }
}
